According to documents from the South Korean Defense Ministry from 2015, North Korea is in possession of 13 pathogens, meaning bacteria and viruses that cause disease, and it can “cultivate and weaponize them within 10 days.”

The pathogens include: anthrax, botulism, cholera, Korean hemorrhagic fever, plague, smallpox, typhoid fever, yellow fever, dysentery, brucellosis, staph, typhus fever, and alimentary toxic aleukia.

Of these, the South Korean authorities believe Pyongyang would focus on weaponizing anthrax, which is highly fatal, and smallpox, which is highly contagious, in the event of an emergency.